Heap-Based Buffer Overflow in Windows Media Enables Local Code Execution

Publication date: 2026-01-13

Last updated on: 2026-01-13

Assigner: Microsoft Corporation

Description

Heap-based buffer overflow in Windows Media allows an unauthorized attacker to execute code locally.

CVSS Scores

EPSS Scores

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Meta Information

Published

2026-01-13

Last Modified

2026-01-13

Generated

2026-07-07

AI Q&A

2026-01-14

EPSS Evaluated

2026-07-05

NVD

CVE-2026-20837

Affected Vendors & Products

Vendor	Product	Version / Range
microsoft	windows_media	*

Helpful Resources

Exploitability

CWE

KEV

CWE ID	Description
CWE-122	A heap overflow condition is a buffer overflow, where the buffer that can be overwritten is allocated in the heap portion of memory, generally meaning that the buffer was allocated using a routine such as malloc().

Attack-Flow Graph

Executive Summary

This vulnerability is a heap-based buffer overflow in Windows Media that allows an unauthorized attacker to execute code locally on the affected system. [1]

Impact Analysis

An attacker exploiting this vulnerability can execute arbitrary code locally, potentially leading to full control over the affected system, including compromising confidentiality, integrity, and availability. [1]

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